Roll for sugar-cane mills.



PATENTED NOV. l2, 1907. H. W. KEN & W. MACKIE.

ROLL P R UGAR CANE MILLS. i

APPLIGATI FILED Anm. 1907.

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v @Nl v No. 871,018.

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No. 871,018. PATENTED NOV. 12, 1907. H. W. AITKEN & W. MACKIE.

ROLL FOR SUGAR GANE MILLS.

APPLICATION FILEDA APR. 2. 1907.

2 SHEETS-SHEET 2.

FIG'

INVENTO'RS wvTNEssEs MM M/M ATTORNEYS j UNITED STAT E S PATENT OFFICE.

HUGH WALLACE AITKEN AND WILLIAM MACKIE, OF GLASGOW, SCOTLAND.

ROLL FOR SUGAR-CANE MILLS.

Specification of Letters Patent.

Patented Nov. 12, 1907.

Application tiled April 2. 1907. Serial No. 365.937.

' width, breaking joint77 or staggered with each other,

and so forming a series of substantially rectangular pockets this form heilig used in conjunction with one or more plain rolls. j

The object of these rolls is to split and effectively crush the cane the first mentioned form is effective in these matters, but fails in that it does not allow free escape of the juice exuded during the nip which is therefore re-absorbed by the'cane upon its being freed from the nip. The second form, while permitting free escape of the juice, fails in that it does not split the cane except at those points in its surface where there are projections-the cane is`not, or rather the greater part of it is not, sufficiently broken during its passage between the rolls.

This invention has for its object to provide an iniproved forni of roll for use in conjunction with a plain roll or rollsl and which while permitting free escape of the exuded juice before it can be re-absorbcd by the cane also effectively splits and crushes the cane.

According to the invention, the roll has formed upon its surface series of short ridges or projections arranged .at substantially 45 degrees to the axis and each series at right angles to the adjacent ones. The ridges do not abut, and thus by them there are formed a series of open-ended channels at substantially 45 degrees to the axis and 90 degrees to each other from the ends of which the juice may pass freely; while because the ridges are unbroken across the face of the roll-that is to say at every circumference there are ridges which the cane is bound to encounterwit is thus effectively split, broken and crushed.

It will be seen that the ridges form what may be termed series of tetrahedroid figures, the ends of which are triangular while the sides are trapezoidal figures, two sides of which are parallel and diagonally opposite pairs of angles of which are equal to two right angles. Each series of these figures is at an opposite inclination to the axis of the roll.

Alternatively, tWo adjacent sides of a pair of oppositely angled figures may be joined. that is to say, merged into an L-shaped figure.

Various arrangements of the novel figuring are shown upon eight accompanying sheets of drawing each view being an elevation to some extent diagrammatic of a portion of a roll having the novel tetrahedroid figuring which is the subject of the invention.

In the example shown in Fig. l, one series, A, of the tetrahedroid figures at an inclination in the one drec tion are inter-tesselated with the other series, B, of opposite inclination.

In the example shown in Fig. 2, pairs of oppositely inclined figures, A, B, merged into s'ingle L-shaped figures 'at their adjacent ends and arranged in the one direction, are inter-tesselated with like figures, C, D, merged similarly but arranged in the opposite direction.

The example shown in Fig. 3, differs from the last only in that the figures, A, B, and the figures, C, D, interniesh in opposite hand.

The example shown in Fig. 4, again differs in that the opposed figures are not completely inter-tesselated,

plain rectangular spaces, E, being left between them, that is to say instead of as in the two preceding examples the gures being in echelon they are in line.

Fig. 5, differs in showing an example with the spaces, E, but in which there is only the one series of joined figures, C, D.

Fig. G, differs from Fig. 4, in that in its example the ends of the figures are prolonged to fill the rectangular spaces (E) of the former example which do not here appear.

In the example shown in Fig. 7, series of tetralicdroid figures, C, are arranged at one angle, abuttingl on all sides with one another but preferably breaking joint as shown. With the ends of this series there abuts the ends of a second similar series, D, of opposite angle, the abutting members in alternate rows forming the L-shaped figures previously described. There may be only the two series in the width of the roll or as many alternate series as desired may be used,-l"ig. 8, shows an example of this last, the alternating series in this case being of the width of but one figure.

What we claim is:-

l. A crushing' roll for Sugar cane mills having upon its surface figures tetrahedroid in form, their ends triangular, their side trapezoidal, arranged at equal and opposite angles to each other.

2. crushing roll for sugar cane mills having upon its surface figures tetrnhedroid in form, their ends triangular, their sides trapezoidal, arranged at equal und opposite angles to each other and so that the ends of each figure abut upon the sides of adjacent figures.

3, A crushing roll for sugar cane mills having upon its surface figures tetrahedroid in form, their ends triangular', their sides trapezoidal, arranged at equal and opposite 'angles to each other and so that the ends of each figure abut upon the sides of adjacent figures, contiguous ends of adjacent figures at right angles to each other being merged.

4. A crushing` roll for sugar cane mills having upon its surface figures tetrahedroid in form, their ends triangular, their sides trapezoidal, arranged at equal and opposite angles to each other, contiguous ends of adjacent figures at right angles to each other being merged.

5. A crushing roll for sugar cane mills having upon its surface figures tetrahedroid in form, their ends triangular,

their sides trapezoidaly arranged at equal and opposite angles to each other, contiguous ends of some adjacent figures at right angles to each other being merged.

In testimony whereof We have signed our names to this 15 specification, in the presence of two subscribing witnesses.

HUGH WALLACE AITKEN. WILLIAM MACKIE.

Witnesses DAvlD FERGUSON, WILFRED HUNT. 

